Locking latch and bolt mechanism.



No. 847,884. PATENTED MAIL 19, 1907 E. C. BELKNAP & E. H. JACKSON. Y 'LOCKING LATCH AND BOLT MECHANISM.

APPLICATION FILED 00T.19. 1906.

3 SHEETS-SHEET 1.

/l/l//l/ lill/lll.

l l V m1841884. 'PATENTED MAR.Y 19, 1907.

E. C. vBELKNAP 6a E. H. JACKSON. LOCKING LATCH AND BOLT MECHANISM.

' APPLICATION FILED 00T.19.l1906.

. 3 SHEETS-SHEET 2.

, PATBNTBD MAR. 19, 1907. B. c. BELKNAP @E H. JACKSON. LOCKING LATCH AND BOLT MBGHANISM.

APPLIOATION FILED 0CT.19. 1906.

3 SHEETS-SHEET 3.

.To all whom, t may concern:

INITED STATES PATENT OFFICE. lEDWIN C. BELKNAP AND ERsKINn H. JACKSON, OF CHICAGO, ILLINOIS.

'LOCKING LATCH AND BOLT MECHANISNI.

Be it known that we, EDWIN C. BELKNAP and ERsKINE H. JACKSON, both citizens of the United States, residing atv Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Locking Latch and Bolt4 Mechanism, of which the following is a specification.

This invention is intended to provide a mechanism in which the latch is located and operated within but independently of the bolt, which makes the dev1ce as a whole eX- tremely compact, rigid, and attractive in apearance an at the same .time provides la olt of largedimensions in comparison with the thickness of the door in which the mechanism is located.

The objects of the invention are to provide l means by which the bolt will be automatically locked in projected position, which abso lutely prevents its being forced back by ressure brought to bear against the end o the, bolt; to provide mechanism adapted to be actuated from the interior of' the door 4for throwing the key-lock out of connection with the bolt when it is desired to prevent the use of the key from the outside; to im rove the construction of the outer knob so t at it will be impossible to disconnect the knob, and thereby obtain access to the interior of the lock; to improve the construction and arrangement of the inner knob by which the device may be adjusted to doors of different thickness, an to provide means for locking theputer knlob against movement when desire The invention further relates to the construction of theinterior mechanism for operating the bolt fand-latch, to the construction and proportion of the lock-framework, and to the construction and arran ement of the device as a whole and the in ividual parts thereof.,

The invention consists in the features of construction and combination of parts, as hereinafter described and claimed.

In the draw'4 s, Figure 1 is a longitudinal sectional `viewuowing the latch projected;

- Fig. 2, a similar viewshowing the latch-retraoted;4 Fig. 3, a similar view showing the bolt projected; Fig. 4, a sectional plan view showing the latch projected; Fig. 5, a crosssectional view taken on line 5 5 looking in the direction of the arrows; Fig. 6, a cross-sec- Specication of Letters Patent. Application filed ooto'ber 19,1906. serial No. 339,729.

.makingupper and lower holes adapted to re- Patented March 19,1907.

tional view of the casing and shell; Fig. 7, a sectional View ofthe latch and bolt operating levers; Fig. 8, a cross-sectional view showing the knobs in section and the bolt-operating shaft in engagement- With the key-cylinder; Fig. 9, a similar view showing the bolt-shaft out of engagement with the key-cylinder; Fig. 10, an inner face view of-the outer s'ection of the outer knob; Fig. 11, an inner -end view of the key-cylinder, showing the' con figuration for the hole which engagesthe bolt-shaft Fig. 12, an'inner face view of the bolt-shaft thumb-piece Fi 13, an inner face view of the outer door-p ate, showing the knob-locking bar disengaged Fig. 14, a similar viewshowing the knob-locking bar in engagement; Fig; 15, a perspective viewof the lock-frame; Fig. 16, a detail of the. bolt-actuating bar; and Figs. 17 and 18, perspective details of the bell-crank levers for actuatingthe bolt and latch, respectively.

Thev device as a whole is located and constructed within a main frame or body 19, which comprises a cylindrical tenon portion 20 and 'an elongated face-plate 21, having I'ounded'ends .22. The face-plate and tenon portions are integrally formed, and the cylindrical tenon portion is cut away on its top to vprovide an opening23 and cutaway onits ends toprovlde inwardly-'extending slots or openings 24. The tenon portion when the parts are assembled is surrounded by a cylindrical casing 25, closed at its rear end 26, and v the diameter of the outer Casin slightly less than the diameter of t e end portions of the facelate, vwhich arrangement is of advantage 1ny that it permits a single bit to be usedin making a central hole to receive tl e body 'of the lock and in .amount of cutting is necessary to prepare the doorfor the lock. Within the tenon portion of the frame is located the bolt., the latch, and the actuating mechanism therefor, which renders the device extremely compact 'and adapted to eas insertion into position in the door. The bo t 27 is of cylindrical formation and comprises a head 28, having in its end a is very lcurved IOO of the tenon portion.

`the latch when brought into abutment with the -unslotted wall 37 of the tenon portion immediately forward of the slot or opening.

Fig. 3 shows the adjustment of the parts when the bolt is projected. The movement of the latch is stopped prior to the final adjustment of the bolt, so that lthe latch will be drawnback entirely Within the recess in the bolt'as the bolt is iinally projected.' The head of the bolt has rearwardly-projecting therefrom a body portion 38 of general cylindrical shape, provided in its top with a slot 39,

which substantially registers with the opening 23 in the. tenon portion of the frame, and the body portion of thel bolt is provided in its rear end with a rearwardly-extending slot 'or openi-n ',40, which substantially reglsters with the s ots or openin s 24 in the rear end g he -body portion on its under side is furtherprovidedwith a longitudinally -.extending lslot or opening 41,

within which is located-a bolt-actuating bar the bridge 42, which has in its center a longitudinallyextending slot-43, dividing the bar as a Whole intoside rails 444, connected at'one end by a rear cross-head 45, and at the other end by a forward crosshead 46 as shown in-detail in 'Fi 1 6. The forward cross-head 46 is provided at its forward end with a ton ue 47, through which asses a screw 48, which enters the head o the bolt and secures the bar rigidly thereto at its forward end',- and the rear end of the bar is likewise secured to a bridgeportion 49 of the Wall of the bolt-body by means of-a screw 50,`which passes through head of t `e boltactuating bar. y The bar is provided on its inner face near lts' rear end with acarn-'recess.`51, which is formed between upwardly/divergent rear and front walls 52 and53, respectivel and the cam- 'recess as a whole is forme 'by cutting or 'shapirig the .inner or cutting edges of the companion side rails 44 ofy the bolt-bar in the manner specified., The forward cross-head `wie sufficiently deep to provide a recess 54` for the reception of a coil-spring 55, which bears against 'the head end-56 of a bolt-lock-A inglever '57, Wliich'is pivoed nea-r its middle,

- between the side rails 44 ofthe bolt-bar, by

. means'oi across-pin or ivot 5 8.

The rear end 59 of t elever lies between 'thesections of the cam-recess 51, and the ortion and into the end cross-l crasse rear end of the lever is normally thrown inwardly by the spring 54 siifiicicntly to lie above the inner depression of the recess, as clearly shown in Figs. l, 2, and 3. When the inner end of the lever is in normal position, the outer or head end 56 will lie within a longitudinally-extending lower slot or opening` ,60 in the tenion portion of the lock-frame, which slot or opening is in substantial aline- Inent with and immediately beneath the upper slot or opening- 23. The lever-head 56 when thus projected will abut against the inner edge of a'bridge portion 6l at the forward end of the slot on the lower side of the tenon portion of the Jframe, in front of which bridge portion is a relatively small slot on opening G2, which is adapter. to receive the head when the bolt is thrown forward out of normal position, as indicated in Figs. l and 2, int-oits projected position, as shown in Fig.

This acts as a loch; for the bolt and prevents its being forced back by pressure ex erted against the end oi the holt. lt will he understood that the bolt-actuating har and lever carried thereby are slidable with the bolt and within the slot 4l in the tenon portion of the frame.

The bolt-actuating bar and the lockinglever 57 are both adapted to be actuated by' means of a centrally-located finger 63, mounted upon a longitudinally transversely ox tending hub 64, which is s nared on its interior to receive a squared beit-shaft 65, which xtends from side to side through the lock and is adapted to be actuated by means oi' the key from the outside and by means of' a fingerpiece from the inside. rihe finger 63 is adapted to bear against either the forward sloping .cam-surface 53 or the rear sloping cani-surface 52 and is of sufficient length to bear against the rear end of the locking-lever 59 when turned to its lowermost position, which permits the head of the loeking-leverto be retracted against the pressure of the coilspring and thereafter )ermits the holt to be advanced or retracted by continued turning of the bolt-shaft.

The side rails 44 'of the bolt-actuatingr bar are provided near theirforward ends with laterall -extending cylindrical bosses, through Whic is passed a pivot-pin 67. The pin serves .as a bearing for a centrally-located bell-crank lever '68, which is mounted bo- 'tween the` side rails 44 of the bolt-bar and comprisesl a rearWardy-extending lower arm 69, adapted to be engaged by the finger 63, and an upwardly-extending actuating-arm 70, which enters the yoke 34 of the latch-bar 33 and bears against a cross-roller 71. When the'bolt is in normal osition, the lower arm of the bell-crank will )e in proper position to be depressed by the finger 63 when turned in a direction opposite to thatin which it' is turned to operate the bolt, asshown in Figs. 1 and2. When the bolt, however, has been lOO wardiy-e'xtending fingers 75, which are se-y cured to hubs 76, rotatably mounted upon the outwardly-projecting .portions of the hub l orsleeve 64'as bearings, and the hubs arefurther' journaled intermediate of the rounded forward ends of the slots 24 in the o po' thrown, will be impbssible to operate the latch, which of course couldnot` be used to open the door in this position -of adjustment.

The bosses '66 on the sides of the side rails 44 serve as mountings for va pair of side bellcrank levers 72, each of which comprises a rearwardly-extending engaging arm 73 and an upwardly-extending actuating-arm 74, which latter, like the arm of the center bell-crank, enters the yoke vand bears against the transverse roller and is ada ted to actuate the latch. One of the outer ell-cranks is. adapted for use with the inner knob of the' door and the other for use with the outer knob, and the two are-thus independent one of the other. The outer bell -cranks are adapted to be-actuated by means of forsite sides of the 'frame,`and a pair of s ideplates 77, which are entered into the ends of" the slots or openings 24, serve in `conjunc' tion with the rounded forward ends of the slots ltoprovide j ournal-bearings Ifor the hubs.

The slide-plates are held in place by means of vertically-extending pins '78, which' can be removed when it isdesired to'disassemble the mechanism for any purpose whatever.` The outer ends 79 of the hubs are formed to constitute clutch members which engage with.

the inner and outer knob mechanism of the door in a manner to be hereinafter explained.

The locking mechanism hereinbefore described is located between inner and outer door-plates 80 and 81, respectively. The plates are connected by means of screwolts 82, (shown in dotted-lines,) which enter recess-bosses 83 on the under face of the.

outer plate, the face of the plate bei imperforated.l The inner plate 1s provide with aj neck 84, which surrounds thel shank 85 of thev inner knob 86, which shank is screw-threaded on its interior to receive an adjustable clutch-plug 87, ,the inner. eI1d88- of which'lis formed to engage with the clutch end 79 fof the inner head 76 of the latch mechanism..

'The tubular shank 84-is provided with an elongated slot-89, which receives the end of a 5 set-screwv 90, which arrangement permits the screw-threaded lug to be adjusted with respect tothe tu ular shank andadapts the locking mechanism for use with doorsof different thickness. The outer end, moreover,

ofthe square boltfshaft is provided atsuitable intervals with cuts 91,. which permit the yshaft to be lmade, at the factory 1ny uniform "sizesand permits the end of the shaft to be .cut off, if necessary, -to adapt the lock to the' "particular thickness of the Idoor intended.

' The tubular shank is provided near its inner. end with an annular( groove 92, which is enyprovided Wit inner knob, and the cap is formed on its ex# terior to provide a recess 97, within which fits Va thumb-piece 98, which'is pivoted by means of a pinF 99 to the end ofthe square shaft and normally li-es withinthe recess 97 and substantially flush with the surface of the knob,..so as not to interfere in anyway with the use lof the knob for throwing latch. The square'shaft withinthe knob is the surrounded'by'a coil-spring 100, which at its inner end bears'against a .disk 101,'.rigidly Emounted on the shaft, and at its outer end bears against the inner face ofthe closing-cap 96. This arrangement permits the shaftto be drawn back out .of-normal position against the tension of the spring,V out ofthe' position shown in Fig. 8 intothe positionshown inl Fig. 9.` This retraction is performed l'by turning the thumb-piece or button 98 out of `transverse relationvt'o the end of the shaft` and into parallel relation therewith.` Inl orderto permit this adjustment, the under face of the thumb-piece or button is provided with a slot 102, w ch provides a space for the -reception of the end of the shaft'when the Vbutton is turned on edge. The button v may be easily turned on edge by insertingthe thumb or finger only under its periphery and thereafter pulling it up out of theA recess within which it normally lies, and when thus adjusted itwill serve'as a handle for operat- IOO" IOS

ing the bolt from the inside' and Will at the same time suiiiciently retract the square bolt-shaft to disengage it from the key-cylinder to be hereinafter described, so Vthat it will be impossible -to manipulate the lock with the key from the outside;

The outer 1plate l81', like the inner plate, is

outer knob 105 comprises an inner -section 106 fandan outer section 107 The inner secan annular iian e or-neck 103, provided with a ledge or shou der 104.v The tion terminatesrin'a shank 108', having a clutch formation at its end 109 similar to the arrangement heretofore described, ,and the inner and outer sections yare secured together by means of .screws 1110, which enterinto bosses 111 on. the interiorof the outersection.- The heads of the screws lie within countersinks 112, which are cut below the surface of-anannular recess orl channel 113,

`formed lon. the inner face of the'finner'knob-` section, and the channel is closed against 'tampering by means of a heavy collar114,

lp ate .to be turno the outer rim .of which enters deeply in the channel andthe inner end of which bears against the shoulder 104 of the neck or flange 103. The collar 114 is preferably formed of cast metal and is of sufficient rigidity to absolutely prevent its lremoval or dis lacementv sufliciently .to secure access to t e screws. The shank 108 is provided with an annular inder 119 of usual ltype,fan opening 120 being formed in the knob 'to .permit access to -the keyhole, and thecylinderis provided with a rib 121, which sadapted to hold thefcylinder rigid between .a ,pair of lugs 1 22 on the inner face of the outer section .of the ltnob. The cylinder terminates .in a 4tubular socket 123, havinga socket-hole 124 of the conti uration shown in Fig. v1,1, which socket-,hole as four .inwardly-projecting .ridges or vcorners 125, and the-.arrangement .is .one which permits .the knob to .be revolved slightlyaround-the .end of theshafafa suicient distance to actuate lthe latch, `.without moving the shaft, which will not ibevengaged until .the square cornersof the shaften age witll'the yridgesor corners 125.gif the soc et. lnorder'fto prevent lmovement .of .the @Utter glgnob when .desired, a knob-locking .bar 126 .is provided., which .operates -between guideways .127 on .the inner .face of theouter late, andthebar .terminates in a rack 128, W ichis adapted to be operated by meansoteeth 129 on a sleeve .130.v The baris provided .witha spring 413.1,

.interposed between the bar and .one .of the guide-ways, which spring prevents accidental .movement of .the bar. Theendnf the bar is :beveled slightly and adapted toenter one of two oppositely-disposed recesses 182,

formed inthe edgeof the-collar-.plate y1i1.7,.as

shown in Figs. 413 and .14. rllhe collar-plate is Iflattened ,on its sides 133, which bear a ainst flat sprin s 134, which .enable the :half around or reversed |when necessary.. The .knob-.lockingbar 126 is actuated by means .-ofa ,thumb-knob 135, which projects ,from vthe inner plate and in position to be manipulatedby persons inside the house, andthe thumb-knob and racksleeve 130 are connectedbymeans cfa square shaft 136, ,whichmay be of suitablelength to accommodate-doors of dierentthiclinesses.

The operation of the .look mechanisrn will be partially understood from ythe foregoing description, but may bebrieiiydescribed as follows: The latch ma be operated at any time, except whenthe olt is-thrown, bythe turning of the inner knob, which turns freely around the square bolt-shaft, sufficiently to depress the inner latch-finger 75 against the inner lbell-crank 74, which acts against the roller 7-1 on the yoke of .the latch-bar and retracts the latch within Athe recess in the end of the bolt, thereby permitting the door to be opened. A similar operation can .be performed by the outer knob, which is permitted to turn partially a suiiicient distance without engaging the end of Athe square bolt-shaft, and this Aoperation can vbe erformed at any time except when the kno -locking bar 126 is thrown into ,position to engage the recess 132 in the collar-,plate 117. The bolt can be thrown from within by means of the thumbdiskQS and can be thrown from without by means of the key when turned in the proper direction. Likewise the bolt can be retracted from either position and the latch can ,be moved independently of the knobs .by con-` tinued turning of the bolt-shatt in the directiQl..1 required -to retract the -bolt until the iinger 63 has moved around into ,position to engage with the middle bell-.crank lever 68, .which arrangement obviatesthe necessity for iirstwithdrawing the bolt by means of the key and thereafter o ening the door by 4ineens of the knob. his operation `can be performed at all times .from within the door,

ut it is impossible to eriornrfrom without in case the bolt-shaft ias been drawn back out of engagement with the socket of the .lock-cylinder. (Shown in Fig. 0.) This enables persons within the hause to be secure against intrusion from without bynnauthorized persons having possession of a key and `provides a means for securing the door withoutany difficulty orloss of time.

The mechanism is constructed with especial reference to its-,availability and adapta.- bility with doors of different styles, and by reason of the symmetrical arrangement; of the parte a certain style of lock can be used on .all styles oi" doors, whether the saine be right or left hand doors or whether they-swing in or out. @rdinarily it is necessary in the construction of locks to provide four styles ot looks for use with the four styles of door above enumerated; but in the resent case the `saine lock can be fitted witi but .slight manipulation to any .style of dooror doors of any thickness `within reasonable limits, which greatly cheapens the construction of the device and the ease with which it can be applied to doors operating under different conditions. The actuatin f mechanism contained Within `the frame o the lock is symmetricalinall respects with the exception of the latch, which enables the lock tobe turned eitlierside up in order to bring the latch in proper position to fit the requirements. At the same time the two sides of the frame are symmetrical., which permits the inner and outer knobs to engage the vmechanism lfrom either side. rThis permits the lock to be applied to tour different styles of door, and applicationin all cases will be made inthe same IOO eeaeea manner by drilling ah'oie in the edge fthe door and thereafter drilling `a recess for the face-plate. Mechanism in this compact cylindrlcal form is very easy of insertion, and the drillin operations necessary can be erforme withmuch greater ease and rapiditythan is possible in cases in which it is necessary to cut a deep rectangular hole to receivethe lock. The same bit which is used to drill the center hole can be moved to make it a shallow cut above and below the hole to receive the ends of the face-plate, and thereafter a slight amount of chiseling willv bel p rovidefor the strai ht sides ofsulicient to the plate. he arrangement o the plate within the latch makes the device compact than is possible in ordinary con-- structions, and at the same time' the appearance of the lock within the door is attractive.

It is not necessary to construct thelock with special reference to the thickness of the intended door, since all locks can be constructed with reference to a maximum thickness, land the end of the bolt-shaft can be cut ol" by the workmanv applying the lock to a suitable length to fit the lntended door.

' Thls arrangement enables the workman or bolt-shaft, a

locksmith to keep in stock a large number of the locks without the necessity for securing diferentstyles 'of locks for different doors.

The construction of the outer knob is one which renders tampering impossible, owing to the protection afforded the screw-heads by the deeply-inserted ring or collar 1 14, and this arrangement, in connection with the means by which the projected bolt is locked against pressure from without,renders the,

lock as a Whole extremely secure and safe.

What we regard as new, and desire to secure by Letters Patent, isv 1. In' a mechanism of the ing iiat against the' end1:=.of the other lmob,.

and ada ted to be turned' back on edge to retract the bolt-shaft out of engagement with the 'key-:lock and thereafter serve as a handle for turning the shaft, substantially as described.

2. In a mechanism of the class described, lthe combination of a bolt, a bolt-shaft, means for moving the bolt adapted'i'to be actuated by the bolt-.shaft,"inner and outer knobs, a key-lock. in the outer knob normally in enclass described, the Combination of a vlock-frame, a bolt slid-u -bar provide ably mounted within the frame, comprising al gagement with the endof the bolt-shafa-and means on the op osite side ofthe door for retracting the bo t-shaft out of engagement with the key-lock preventmg key, substantially as desc`1-"fibiedv 3.l In a mechanism ofthe classdescribed, th'e combination of a bolt, 'a bolt-shaft, means for movin Vthe bolt adapted to be lactuated by the bo t-shaft, inner and outer knobs, a key-lock inthe outer knob normally in enthe use of the cgiagpmen't with the end'of the bolt-shaft, a l is 'or plate pivoted to the opposite-end of the bolt-Shaft 'and normally in lat contact 'with the inner knob, and adapted to be turned on edge to retract the bolt-shaft and thereafter serve as a handle for turning the shaft, substantially as descr'bed. f

4. lIn a vmechanism ofthe class described,

the combination of a bolt, `a latch normally l 35 projecting outwardly from' the bolt, a latchbar extendingl rearwardly from the latch andhaving o'n its rear end a cross-abutment, companion outer bell-crank levers in engagement with the abutment, innerand outer knobs, companion iingers connected with the two knobs and adapted to'engage with the companion bell-crank levers,'a bolt-bar pro'- vided with abutments,' a in'geradapted to move betweenV the abutments for advancin and retracting'the bolt, abolt-shaft on whic the iinger is mounted, such shaft passing through the latch-actuating' iingers, andi a key-lock in one of the knobs ormoving `the` l bolt-shaft, substantiallysas'4 described. 5. In a mechanism of the class described,

the combination of a bolt,a`,latch normally projecting outwardlyfrom the bolt, `a latch- 9,1- extending rearwardly iirom the latch and` having on itsrear end a cross-abutment', companion outer bell-crank levers in engagement with -the com nion bell-crank-levera'a bolt-f with abutments, a iin er adapted to move between the abutments or 1v l advancing and retracting the bolt, a boltshaft on which the finger is mounted, such shaft passing throughl thellatch-actuating fingers, a key-lock inI one of the knobs for moving'the 'bolt-shaft, and an intermediate bellcrank lever pivoted between the. companiony bell-crank levers, vand adapted to be actuated by the fin er on the bolt-shaft, substantially asdes'cri'ed. n '1 v.

6. In a mechanism ofthe class described,

the combination ofa bolt having a recess in its head and havin va 'hollow body, a latch operating within t, e recess, a rearwardlyextending latch-barv terminating in its rear end in a yoke, a cross-abutment on the yoke,

a bolt-bar provided on' its inner edge with abutments, vcompanion outer bell-crank levers, and an intermediate bell-crank lever Vpivoted to the bolt-bar, inner and outer nobs, independent fingers connected with the two 'knobs for actuating the companion outer bell-crank levers, a .bolt-shaft passing through said fingers, `a finger on the boltshaft adapted to operate between the abutments on the bolt-bar and adapted to beturned into position to actuate the intermediate bell-crank lever, and a key-lock in `position to be engaged by the finger on the olt-shaft for retracting the head end of the lever` and permitting movement of the bolt, y

substantially as described.

7. In a mechanism of the class described, the combination of a bolt having a recess -in its head and having a hol-low body, alatch operating within the. recess, a rearwardly-'extending latch-bar terminating in its rear 'end in a yoke, a cross-abutment on-the yoke, a bolt-bar provided in its inner edge with abutments, companion outer bell-crank levers, and an intermediate lbell-crank-flever pivoted 'to the bolt-bar, an .abutment for limiting the forward lmovement of the latchbar, inner and outer knobs, independent fingers connected with the' two knobs for actuatin-g the com anion outer bell-crank levers, a bolt-sha t passini through said fingers, a finger on the bolt-,s aft ada ted to operate between the abutments on t e-bolt-bar and adapted to be turned into position to actuate the intermediate bell-crank lever, and a key-lock in one of the knobs adapted toV turn the bolt-shaft; a locking-lever pivoted to the bolt-bar and provided with a head ada ted'to ybe projected outwardly to lock v the olt in advanced position, the inner end of the lever beingin position to beengaged 'by the finger on the bolt-shaft for retracting the head' end of :the lever and permitting movement ofthe bolt, substantially as described.

8. In ai mechanism of the class described, the combination of a-bolt, inner and outer knobs, a longitudinally movable and-rotatable bolt-shaft, a key-cylinder in oneof the knobs having a revoluble socket-shank held against longitudinal movementand adapted normally to engage the bolt-shaft for revolvin the same, means contained within :the

ot er knob for retracting the bolt-shaft outof engagement with the key-cylinder, and mechanism actuated bythe rotary movement of the bolt-shaft for moving the bolt, substantially as described.

9. In -a mechanism of the class described, the combination of albolt, inner and outer knobs, a Ilongitudinally-movable rotatable bolt-shaft in line with the axes of the knobs, mechanism for moving the bolt by the rotation of the bolt-shaft, a key-cylinder in the -outer knob having a revoluble socket-shank` held a ainst' lon itudinal movement and adapte to norma ly engage one end of the bolt-shaft for the purpose of revolving the same, and a thumb-disk in the face of the' other knob for retracting the shaft to disengage it from the key-cylinder, substantially as described.

10. In a mechanism of the class described, thecombination ofa bolt, inner and outer knobs, a longitudinally-movable rotatable bolt-shaft in line with the axes of the knobs, mechanism for moving the boltby the rotation of thebolt-shaft, a key-cylinder in the outer knob having a revoluble socket-shank held a ainst lon itudinal movement and adapte to norma ly engage one end of the bolt-.shaft for the purpose of revolving the same,'and a thumb-piece secured to the inner endof the bolt-shaft and projecting outwardly for moving the bolt-shaft into and out lof. en agement with the key-cylinder, substantially as described.

1'1. In a mechanism ofthe class described, the combination of a bolt, inner and outer knobs, a longitudinally-movable rotatable bolt-shaft in line with the axes of the knobs, mechanism for moving the bolt by the rotation of the bolt-shaft, a key-cylinderin the outer knob adapted to normally engage one end of the bolt-'shaft :for the purpose of revolving the same, and a thumb-piece pivoted to the inner end of the bolt-shaft and normally lying flat against the face of the inner ,knob and adapted to be turned up on edge to retract the bolt-shaft out of engagement with the key-cylinder, substantially as described.

12. In a bolt mechanism, the combination of a knob provided with a shank, a key-cylinder within the knob, a collar-plate secured to and revoluble with the knob shank and IOO adapted to permit the knob and key-cylinder swung around'under tensionfor purposes of adjustment, a knob-locking bar adapted lto enter either of the recesses, and a thumbpiece for actuating the bar, substantially as described. j

14. In a bolt mechanism, the combination of a knob provided with a shank, a collarplate securedi to and revoluble with the shank, and provided with companion recesses cn opposite sides, a flat spring bearing against the edge of the collar-plate and adapted to limit its rotation under ordinary circum- IOS IIO

stances, but adapted to permit the collarplate to be swung around under tension for purposes of adjustment, and 4a knob-lookin p bar adapted to entereither of the" recesses an 5 provided on its end with a rack,V a thumbieceand a pinion adapted to be revolved by the thumb-piece and engaged with the rack for moving the bar into and out'of engaement With the. coacting recess, substantia ly ro as described. l

l5. In a locking mechanism, the combination of a frame comprising a face-plate and a cylindrical tenon portion, the tenon portion being open on its rear end and provided in its sides with recesses out back from the rear 15 -open end, slide-plates adapted to be entered into the slots to provide journal-bearin s,

and an outer cylindrical shell fitted over t e tenon portion and open at its forward end and closed at its rear end and provided with zo holes adapted to register with the bearings l for 4 aiiordlng a substantially dust-proof casing, substantially as described.

Y EDWIN C. BELKNAP.

VERSKINE H. JACKSON.

. Witnesses A l SAMUEL W, BANNING, CHAs. F. COOKE. 

